Pregnancy among thyroid cancer survivors: do thyroidectomy and radioactive iodine matter?

Thyroidectomy and RAI therapy do not diminish pregnancy probability in young women with thyroid cancer. Age remains a crucial factor, with younger women more likely to conceive. These findings are critical for fertility counseling and treatment planning. Key message What is already known on this subjec? Thyroid cancer primarily affects young women, and its standard treatments, including thyroidectomy and radioactive iodine (RAI) therapy, have raised concerns about their potential impact on fertility. Previous studies have shown that RAI treatment may temporarily affect ovarian function but typically does not have a significant long-term effect on fertility. What this study adds? This nationwide population-based study found that neither total nor partial thyroidectomy, nor RAI treatment, adversely affects the likelihood of pregnancy in young women with thyroid cancer. Age was identified as the most significant factor influencing pregnancy, with younger women having a higher probability of becoming pregnant after treatment. How this study might affect research, practice, or policy? Clinicians should recognize that age, rather than the type of thyroidectomy or RAI treatment, is the most critical factor influencing fertility in young women with thyroid cancer. This insight can guide personalized fertility counseling and treatment planning to optimize outcomes.